fix: remove packages/shared and override NODE_ENV for Coolify builds

Portal has no shared package dependency. Coolify injects ARG
NODE_ENV=production which skips devDependencies.

Dockerfile

@@ -1,10 +1,11 @@
 FROM node:20-alpine AS builder
+ARG NODE_ENV=production
+ENV NODE_ENV=development
 WORKDIR /app
 COPY package.json package-lock.json* ./
-COPY packages/shared/package.json ./packages/shared/
 RUN npm install
-COPY packages/shared/ ./packages/shared/
 COPY . .
+ENV NODE_ENV=production
 RUN npx next build
 
 FROM node:20-alpine AS runner